Miss Wrightson's gruesome murder, in December 2014, has been described as the most brutal detectives have seen for 25 years.

PA

CALLOUS: The second Snapchat selfie taken moments after the murder

PA

CRUEL: The teen girls used this blood-drenched TV as a weapon to murder Angela Wrightson

Mr Justice Globe told the court he can only pass one mandatory sentence - detention at her majesty's pleasure.

But he set the minimum term they must serve at 15 years.

The judge refused to reveal the identity of the teen killers by lifting an order banning publication of their names, amid fears they might commit suicide.

PA

BARBARIC: This wooden stick studded with screws was used to beat poor Angela Wrightson

“You left not knowing or caring whether she was alive or dead”

Mr Justice Globe

Sentencing, the judge said: "This is not a case of instantaneous death following a shot, a stab or a blow, she pleaded for you stop, this was a sustained attack over a long period of time carried out with weapons in many different ways, she suffered mentally and physically before she lost consciousness and died.

"Her alcoholic state may have numbed the pain but it certainly won’t have taken it away, this is a highly significant aggravating factor.

"She must have despaired at being unable to escape you in the confines of her living room this was in her own living room. She kindly invited you in she kindly bought you what you wanted and let you stay. You abused her hospitality and attacked her again and again.

"You left not knowing or caring whether she was alive or dead."

This chilling CCTV footage revealed the moment the twisted pair returned to the scene of the crime hours later.

They are believed to have entered her home through an unlocked back door at around 9pm on December 8, 2014.

At around 11pm they left the house while listening to music and covered in Miss Wrightson's blood — and by 4am the brazen pair can be seen clambering into the back of a police van which they called to ask for a lift.

Jurors heard how Miss Wrightson was nicknamed "Alco Ange" and had bought the girls booze and cigarettes on several occasions.

PA

GRUESOME: This shovel was used to batter frail Angela Wrightson

SWNS

TRAGIC: Floral tributes outside Angela Wrightson's home

Angela Wrightson’s mother, Maureen, revealed how she would never be able to “blink away” the horrific image when she saw her daughter’s battered body in the mortuary.

She sobbed in the public gallery at Leeds Crown Court as her statement was read out.